/*
 * Copyright 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.context.annotation;

import org.springframework.beans.factory.Aware;
import org.springframework.core.type.AnnotationMetadata;

/**
 * Interface to be implemented by any @{@link Configuration} class that wishes
 * to be injected with the {@link AnnotationMetadata} of the @{@code Configuration}
 * class that imported it. Useful in conjunction with annotations that
 * use @{@link Import} as a meta-annotation.
 *
 * @author Chris Beams
 * @since 3.1
 *
 * ImportAware
 * 用于被@Import导入的类，获取导入源（标记@Import注解的类）的元注解信息。
 *
 * 实现原理：
 * @see ConfigurationClassPostProcessor#IMPORT_REGISTRY_BEAN_NAME
 * @see ConfigurationClassParser.ImportStack#registerImport(org.springframework.core.type.AnnotationMetadata, java.lang.String)
 * @see ConfigurationClassPostProcessor.ImportAwareBeanPostProcessor
 */
public interface ImportAware extends Aware {

	/**
	 * Set the annotation metadata of the importing @{@code Configuration} class.
	 *
	 * 设置所有配置类的元注解信息
	 */
	void setImportMetadata(AnnotationMetadata importMetadata);

}
